The white iH8Sn0w.
For future (tomorrow or today) White users, limera1n is NOT patched and has no difficulty with current jailbreaks.
Also for those wondering, i0n1c’s untether will work for the device as well.
i0n1c’s exploit is based. Since the 4 runs the SAME iOS, its fine.
You can find instructions on how to jailbreak your new device using the Appleguider Jailbreak Wizard.